(1) You may add a trade or "DBA" name to your license if you first apply to the department, in a form prescribed by the department, and receive department approval. When the department has approved the trade name, you must conduct business under that trade name in at least one of the two following ways:

(a) Use your license name together with the trade name; or

(b) Use your license number together with the trade name.

(2) The director may deny an application for a proposed DBA name if the proposed DBA name is similar to a currently existing licensee name.